Organic-inorganic hybrid polymer latex for high durable traffic marking paint

ABSTRACT

The present invention includes processes and methods of preparing the hybrid polymer latex for coating composition that can be used for traffic markings, transportation and signages. The process may comprise preparing an initial monomer mix pre-emulsion of unsaturated organic compounds, preparing an initial inorganic dispersion feed comprising modified inorganic component, preparing an initiator solution, and adding at least 2 parts per 100 parts polymer by weight of polyfunctional amines to result in final hybrid polymer latex. The coating composition obtained by the disclosed process provides superior qualities of moisture proofing, water repellence and early rain resistance to enhance durability of the product.

CROSS-REFERENCE TO RELATED APPLICATIONS AND PRIORITY

The present application is a division application of U.S. patentapplication Ser. No. 15/728,995 filed on Oct. 10, 2017 which furtherclaims priority from the Indian patent application number 201721028295filed on Aug. 9, 2017, incorporated herein by a reference.

TECHNICAL FIELD

The present invention is directed to a process of obtaining coatingcompositions and particularly to a process of obtaining hybridorganic-inorganic polymer latexes used in traffic marking paints for aplurality of applications on road surfaces.

BACKGROUND

Roads, airport runways, bridges, railway crossings etc. need to containcertain markings, usually executed through paints. These transportationsurfaces are marked for lane markings, pedestrian crossings, directionalmarkings and other markings which serve multiple purposes. On the onehand, this helps to control the flow of traffic while on the other itaverts collision dangers. Further, the said traffic markings also act assafety markings to provide information to the vehicle operator. Withsuch an important role in maintaining order on roads, runways and othertransportation surfaces, these markings need to be highly durable so asto be visible to the driver under different weather conditions like highhumidity, ultra-violet ray exposure, heavy rainfall etc.

In the previous art, traffic markings for roads and other surfaces havebeen produced using a high percentage organic binders. However,solvent-based organic coating materials are associated with variousissues. Firstly, pure solvent based organic coatings tend to degradefaster upon exposure to high humidity, heavy rainfall and upon exposureto ultra-violet rays, and this greatly decreases their life-spanrequiring the traffic markings to be replaced within shortened spans oftime. Secondly, pure solvent based organic coatings are associated withthe release of volatile organic compound(s) (VOC) into the atmosphere,which is environmentally unsustainable due to its catastrophic impact onthe protective ozone layer of the earth. Thirdly, many such organicmoieties are photo-sensitive and undergo rapid degradation. For e.g.polystyrene (PS), one of the most important materials in the modernplastic industry, having been used all over the world due to itsexcellent physical properties and low-cost, however, when polystyrene issubjected to UV irradiation in the presence of air, it undergoes a rapidyellowing and a gradual embrittlement (Yousif E., and Haddad, R.,Springerplus. 2013; 2: 398).

In the state of art, coating compositions with thermoplastic bindershave been utilized on a commercial scale for traffic markings as analternative to solvent-based organic binders due to absence of VOC.However, the application range covering the suitability of thesethermoplastic coating compositions is limited and the application ofpaints having thermoplastic binders is rather difficult because itrequires heating and spreading the paints during application of thepaints.

In the state of art, the use of inorganic binders for coatingcompositions has been disclosed. Such inorganic coating materials can beproduced with good adhesion properties, high crack resistance, fireresistance, weather resistance and high gloss. Various ingredients canbe used to produce aqueous viscous inorganic binder formulation whichfurther hardens the inorganic coating material along with the use of acrosslinking agent and water and silica based binder of an alkali metalsilicate is a popular choice. However, these inorganic-based materialsdo not possess the desired properties for traffic markings and arebrittle and inflexible which defeats the visual and structural integrityof the markings and are therefore not fit for this purpose. Further, theaccumulation of dirt and yellowing of the paint composition over thecourse of time decreases their visibility and usefulness.

In the state of the art, the use of some hybrid polymers of organic andinorganic moieties have been disclosed. However, such hybrid latexessuffer from various shortcomings. Firstly, the mode of preparation ofsuch hybrid coatings is such that the polymer hybrid is not formed insitu but rather separately prepared and does not allow homogenousintegration and association of the inorganic moiety in the polymerresulting in paints with shorter durability and resultantly such paintsare unsustainable in the long run.

Therefore, what is needed is a process of obtaining a durable,environmentally friendly, and cost-effective polymer latex for widescale and diverse application(s) across a plurality of traffic markings.Thus, disclosed is an organic-inorganic hybrid coating composition isthat is durable, easy to apply and stable over an enhanced period oftime for traffic and road markings and at the same time isenvironmentally friendly which may solve long pressing need.

SUMMARY

This summary is provided to introduce aspects related to a method ofdevelopment of a polymer latex comprising an organic-inorganic hybridcomposition to be used as high durable traffic marking. This summary isnot intended to limit or restrict the scope of the innovation.

Disclosed is a process of obtaining organic-inorganic hybrid polymerlatex coating composition for traffic and road markings, which overcomesthe problems in the prior art. The coating composition obtained by theprocess of the invention has excellent physical properties which betterenable the composition to withstand mechanical and climatic factors likesheer force, vehicle load, rainfall, humidity, extreme sunlight etc.making it an extremely viable option for large scale commercialization.

In one aspect, the features of an organic-inorganic hybrid polymer latexobtained by the disclosed process are to be used in traffic markingpaints, wherein the polymer latex may include an organic fractioncomposed of polymer wherein the total solid content of constituentingredients is at least 45% w/w, are disclosed. The polymer latex mayfurther include a modified inorganic component. The modified inorganiccomponent may include an inorganic fraction, wherein the inorganicfraction is at least 50% of the modified inorganic component at anygiven instance. The inorganic fraction may be composed ofnanoparticulate dispersion of an oxide of a metalloid from Group 14 ofthe periodic table having 4 valence electrons in its p-orbital and suchthat the modified inorganic component in the said polymer latex is atleast 0.4 parts per 100 parts by weight of the polymer. The said polymerlatex may further comprise polyfunctional amines such aspolyethyleneamine or polymerization products of aziridine or acombination thereof which comprise at least 2 parts per 100 parts byweight of the polymer. The said polymer latex may further possess aglass transition temperature between the range 0 degree Celsius to 60degree Celsius and more preferably in the range of 15 degree Celsius and35 degree Celsius.

In one aspect, the features of the process of obtaining anorganic-inorganic hybrid polymer latex are to be used in traffic markingpaints, wherein said process may include an initial step of preparinginitial monomer mix pre-emulsion (Biphasic System A) in demineralizedwater of unsaturated organic compounds that contain a COOH group(carboxylic acid group), preferably of organic compounds with thegeneral formula CH₂═CHCOOH including salts, esters, alkyl esters of thesaid compounds and with the use of conventional surface-tension reducingagents like detergents or emulsifiers or wetting agents, are disclosed.The said process may include a further step of preparing an initialmodified inorganic component, which may include an inorganic fractiondispersion (Biphasic System B) by mixing the chemically or thermallymodified nanoparticulate dispersion of oxide of an element having 4electrons in its outer orbital in demineralized water. The said processmay include a further step of preparing an initiator solution (SolutionC) for polymerization by mixing a compound in demineralized water andadding at 82 degree Celsius wherein said compound through thermalgeneration of free radicals initiates the polymerization of the initialpre-emulsion. The said process may include in a further step—theaddition of Solution C simultaneously with Biphasic System A andBiphasic System B at 82 Degree Celsius to a pre-formed Acrylic polymerlatex used as external seed in a kettle charge comprising at least 33%solids of particle size of maximum 60 nm (Seed Latex D) to form Polymerlatex E. The said process may include a further step of holding themixture at 82-86 Degree Celsius for at least 30 minutes and subsequentlypartially cooling the Polymer latex E to 70 degree Celsius followed bythe addition of a chaser catalyst system including a solution ofTertiary butyl hydroperoxide simultaneously with Sodium metabisulphitesolution to allow traces of monomer to react. The process may furtherinclude a step of cooling the polymer latex Polymer latex E further to45 degree Celsius followed by neutralization with ammonia to pH 9.5-10.5and addition of at least 2 parts per 100 parts by weight of the polymerof polymerization products of aziridine or polyethyleneamine or acombination thereof as post-additives to result in final hybrid polymerlatex (Polymer latex F).

In another aspect, the features of the process of obtaining anorganic-inorganic hybrid polymer latex to be used in traffic markingpaints, wherein said process may include alternative methods ofnanoparticulate inorganic fraction (Biphasic System B) addition, andwherein said nanoparticulate inorganic fraction (Biphasic System B) maybe added either through delayed addition technique or may be pre-mixedwith the initial monomer mix pre-emulsion (Biphasic System A) or may bepre-added to the kettle charge before addition of the initial monomermix pre-emulsion (Biphasic System A).

In another aspect, the features of the process of obtaining anorganic-inorganic hybrid polymer latex to be used in traffic markingpaints, wherein said process may include an initial step of preparingpure monomer mixture (Monophasic System A) of unsaturated organiccompounds that contain the COOH group, preferably of organic compoundswith the general formula CH₂═CHCOOH including salts, esters, alkylesters of the said compounds and simultaneous addition ofnanoparticulate inorganic fraction (Biphasic System B) with the use ofconventional surface-tension reducing agents like detergents oremulsifiers or wetting agents, are disclosed.

In yet another aspect, the features of the process of obtaining anorganic-inorganic hybrid polymer latex to be used in traffic markingpaints, wherein the addition of the inorganic nano-particulate fractionmay include charging said nano-particulate inorganic fraction to amonomer mix pre-emulsion as a separate feed simultaneously using delayedaddition technique at 82 degree Celsius or may comprise addition of saidnanoparticulate dispersion through the monomer mix pre-emulsion or maycomprise addition of the said nanoparticulate dispersion in the initialreactor charge, are disclosed.

In one aspect, the features of an organic-inorganic hybrid polymer latexto be used in traffic marking paints, wherein the said polymer latex canbe incorporated into either conventional traffic paint with lower wetfilm thickness application or can be incorporated into high durablepaints with higher wet film thickness application, are disclosed.

In one aspect, the features of an organic-inorganic hybrid which resultsin homogenous integration and association of the inorganic moiety in thepolymer by crosslinking and polymerization, are disclosed.

In one aspect, the features of an organic-inorganic hybrid polymer latexto be used in traffic marking paints, wherein the said polymer latexcontains the modified inorganic component which may include at least 50%of inorganic fraction and which may be either added during thepolymerization along with monomer mix pre-emulsion or separately at theend of the reaction, are disclosed.

In one aspect, the features of an organic-inorganic hybrid polymer latexto be used in traffic marking paints, wherein the said polymer latex hasstrong bonding properties to a plurality of substrates, possesses goodwater repelling properties, possesses mechanical strength to resist wetscrubbing, higher endurance to humid and wet weather conditions and hasstrong durability to retain physical appearance even after aconsiderable period of time, are disclosed.

In one aspect, the features of an organic-inorganic hybrid polymer latexto be used in traffic marking paints, wherein the said polymer latex hasreduced no-pick-up time and tack-free time and is environmentallyfriendly and is easy to apply, are disclosed.

In one aspect, the features of method of application of a trafficmarking paint comprising at least an organic-inorganic hybrid polymerlatex, wherein said polymer latex comprises an organic fractioncomprising at least 45% w/w solids per total ingredients of the polymer,a modified inorganic component comprising at any given instance at least50% of inorganic fraction wherein said inorganic fraction may comprisenanoparticulate dispersion of an oxide of a metalloid from Group 14 ofthe periodic table having 4 valence electrons in its p-orbital and suchthat the modified inorganic component in the said polymer latex is atleast 0.4 parts per 100 parts by weight of the polymer, and may furthercomprise polyfunctional amines like polyethyleneamine or polymerizationproducts of aziridine or a combination thereof which comprise at least 2parts per 100 parts by weight of the polymer, are disclosed.

Other features and advantages of the present invention will be apparentfrom the following detailed description of the invention whichillustrates, by way of example, the principles of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The detailed description is given with reference to the accompanyingfigure. In the figure, the left-most digit(s) of a reference numberidentifies the figure in which the reference number first appears. Thesame numbers are used throughout the drawings to refer like features andcomponents. The figures provided hereinunder do not display terms suchas Biphasic System A, Biphasic System B, Solution C, Seed latex D,Polymer latex E or Polymer latex F, which are used throughout thespecification, and the figures should be read so as to refer to steps ofthe process for obtaining said hybrid polymer latex.

FIG. 1a (100 a) illustrates an overview of the process for making anorganic-inorganic hybrid polymer latex to be used in traffic markingpaints wherein addition of inorganic component is through delayedaddition technique in accordance with an embodiment of the presentinvention.

FIG. 1b (100 b) illustrates an overview of the process for making anorganic-inorganic hybrid polymer latex to be used in traffic markingpaints wherein addition of inorganic component is simultaneously withthe monomer mix pre-emulsion in accordance with an embodiment of thepresent invention.

FIG. 1c (100 c) illustrates an overview of the process for making anorganic-inorganic hybrid polymer latex to be used in traffic markingpaints wherein addition of inorganic component is through pre-additionin kettle charge in accordance with an embodiment of the presentinvention.

FIG. 2 illustrates wet scrub resistance test results for the doublenegative control polymer latex i.e. polymer latex without inorganicfraction as well as without polyfunctional amines in accordance with anembodiment of the present invention.

FIG. 3 illustrates wet scrub resistance test results for a polymer latexwith no inorganic component but with presence of polyfunctional aminesin accordance with an embodiment of the present invention.

FIG. 4 illustrates wet scrub resistance test results for a polymer latexwith external addition of inorganic component and presence ofpolyfunctional amines in accordance with an embodiment of the presentinvention.

FIG. 5 illustrates wet scrub resistance test results for a polymer latexwith addition of 1.5 parts of modified inorganic component per 100 partsof polymer during reaction and presence of polyfunctional amines inaccordance with an embodiment of the present invention.

FIG. 6 illustrates wet scrub resistance test results for a polymer latexwith addition of 0.75 parts of modified inorganic component per 100parts of polymer during reaction and presence of polyfunctional aminesin accordance with an embodiment of the present invention.

FIG. 7 illustrates wet scrub resistance test results for a polymer latexwith addition of 1 parts of modified inorganic component per 100 partsof polymer during reaction and presence of polyfunctional amines inaccordance with an embodiment of the present invention.

FIG. 8 illustrates wet cohesion test results for a polymer latex withaddition of 1.25 parts of modified inorganic component per 100 parts ofpolymer during reaction and presence of polyfunctional amines inaccordance with an embodiment of the present invention.

FIG. 9 illustrates wet scrub resistance test results for a polymer latexwith addition of 0.75 parts of modified inorganic component per 100parts of polymer during reaction but presence of only polyethyleneaminein accordance with an embodiment of the present invention.

FIG. 10 illustrates wet scrub resistance test results for a polymerlatex with addition of 0.75 parts of modified inorganic component per100 parts of polymer during reaction but total absence of polyfunctionalamines in accordance with an embodiment of the present invention.

FIG. 11 illustrates Transmission Electron Microscopy (TEM) of hybridpolymer latex at a scale of 1000 nm.

The figures depict embodiments of the present disclosure for purposes ofillustration only. One skilled in the art will readily recognize fromthe following description that alternative embodiments of the stepsillustrated herein may be employed without departing from the principlesof the disclosure described herein.

DETAILED DESCRIPTION

The foregoing detailed description of embodiments is better understoodwhen read in conjunction with the appended drawings. For the purpose ofillustrating the disclosure, there are shown in the present documentexample constructions of the disclosure; however, the disclosure is notlimited to the specific design disclosed in the document and thedrawings.

The detailed description is provided with reference to the accompanyingfigures. In the figures, the left-most digit(s) of a reference numberidentifies the figure in which the reference number first appears. Thesame numbers are used throughout the drawings to refer like features andcomponents.

The present invention is directed to provide an organic-inorganic hybridpolymer latex to be in traffic marking paints and process thereof.Traffic marking paints are applied to roads, parking lots, airports,shipping dockyards and the like, typically concrete and asphalticsurfaces, to instruct users and to demarcate traffic lanes, parkingspaces, and the like. The production process of the polymer latex andthe unique characteristics attributable to the latex is based additiontechnique for the modified inorganic component comprising an inorganicfraction as well as post addition of additives like polyethyleneamine orpolymerization products of aziridine or combinations thereof.

In one of the embodiments, the invention relates to a process ofobtaining coating composition which can be used more particularly formaking traffic and road marking paints to be applied for a plurality ofpurposes including but not limited to roads, footpaths, railwaycrossings, airports, shipping dockyards etc. The coating compositionobtained by the disclosed process may comprise of a mixture of a bindercapable of being polymerized and crosslinked and comprising an organicmaterial and an inorganic material. The said hybrid composition maycontain at least 45% solids of the organic moieties used to make thecoating composition and additionally may contain up to two additiveswhich contribute to moisture proofing, water repellence and early waterresistance of the resultant composition and the paint in which it isused.

In one embodiment, the invention relates to an organic-inorganic hybridpolymer coating composition obtained by the disclosed process whereinthe organic fraction of polymer may contain the polymerization productsof unsaturated organic compounds that contain the COOH group (acarboxylic acid group), more particularly organic compounds with thegeneral formula CH₂═CHCOOH. Some of the organic compounds which can beincorporated within the hybrid polymer coating composition and whichpossess the general formula CH₂═CHCOOH include but not limited tocompounds like 2-propenoic acid, acrylic acid, vinylformic acid. Acrylicacid is a colorless liquid with a distinctive acrid odor. It has a flashpoint of 55° C., a boiling point of 141° C., a freezing point of 12° C.,and prolonged exposure to fire or heat can cause polymerization makingit an sought-after constituent of coating compositions and the presentinvention relates to a composition which more particularly may compriseesters, alkyl esters of acrylic acid, as well as any salts of acrylicacid including but not limited to aluminium salt, ammonium salt, calcium(2:1) salt, calcium (2:1) salt dehydrate, cobalt salt, ferrous salts,magnesium salt, potassium salt, silver salt, sodium salt, zinc salt, orany combinations thereof.

In another embodiment, the invention relates to an organic-inorganichybrid polymer coating composition wherein the said composition mayinclude self-polymerization products of such organic compounds as wellas copolymers formed by the combination of said organic compounds andmonomers of other compounds including but not limited to vinyl plasticssuch as polyvinyl chloride, polyvinyl acetate, vinyl chloride, polyvinylacetals, vinyl acetate copolymers, styrene, vinyl acetate, butadiene,monovinyl acetylene polymers such as the neoprenes, particularlyneoprene AC and neoprene AD, styrene-butadiene and similar copolymers,chlorinated rubber, and butyl rubber or any combination thereof.

In a preferred embodiment, the invention relates to an organic-inorganichybrid polymer latex to be used in traffic marking paints wherein thesaid organic fraction may be an acrylic resin. The polymer may beprepared by conventional techniques known to those generally skilled inthe art by the aqueous emulsion polymerization ofethylenically-unsaturated monomers and is selected at least from thegroup of organic compounds comprising of but not limited toMethyl-Methacrylate, Butyl Acrylate and (Meth)acrylic acid.

In an exemplary embodiment, the invention relates to anorganic-inorganic hybrid polymer latex to be used in traffic markingpaints wherein the said organic fraction is an acrylic resin and whereinthe total solid content of the latex may be up to 60% solidsweight/weight, preferably up to 55% solids weight/weight, or morepreferably at any given point at least 45% solids based on the totalweight of all ingredients.

In one embodiment, the invention relates to an organic-inorganic hybridpolymer latex to be used in traffic marking paints wherein the inorganicmaterial in the said hybrid polymer latex may be an oxide of an elementwhich is chemically inert and which can impart the traffic markingpaints with a high degree of high-moisture resistance along withimparting other qualities like hardness, stability durability. Manymetalloids known presently may suit the criteria and may comprise theinorganic fraction of the hybrid polymer latex to be used in trafficmarking paints.

In an exemplary embodiment, the invention relates to anorganic-inorganic hybrid polymer latex to be used in traffic markingpaints wherein the modified inorganic component may comprise of ametalloid with four valence electrons in its p orbital and belonging tothe group 14 elements of the periodic table. The modified inorganiccomponent may comprise a total content in the range of 0.4 parts ofmodified inorganic component per 100 parts of polymer to 5 parts ofmodified inorganic component per 100 parts of polymer, more preferablyin the range of 0.4 parts of modified inorganic component per 100 partsof polymer to 2 parts of modified inorganic component per 100 parts ofpolymer and at no given instance is less than 0.4 parts of modifiedinorganic component per 100 parts of polymer. At any given instance, themodified inorganic component may comprise at least 50% of inorganicfraction, wherein the inorganic fraction may comprise oxide of ametalloid with four valence electrons in its p orbital and belonging tothe group 14 elements of the periodic table.

In one embodiment, the invention relates to an organic-inorganic hybridpolymer latex to be used in traffic marking paints wherein the modifiedinorganic component comprising oxide of a metalloid with four valenceelectrons in its p orbital and belonging to the group 14 elements of theperiodic table may contain particles with varying size, distribution,shape and surface of the individual particles and further the saidinorganic material may be made in a crystalline, amorphous or gel-likeformulation. The size and distribution of particles play an importantrole in determination of hardness, resistance to weathering, durability,cost effectiveness, enhanced mechanical strength and abrasion resistanceand other qualities. The metalloid particles making up the inorganiccomponent may preferably be extremely small i.e. not more than 500 nm atany given point to facilitate equal distribution and potency of thepolymer latex.

In an exemplary embodiment, the invention relates to anorganic-inorganic hybrid polymer latex to be used in traffic markingpaints wherein the modified inorganic component may comprise, at anygiven instance, an inorganic fraction, wherein the inorganic fractionmay comprise an oxide of a metalloid with four valence electrons in itsp orbital and belonging to the group 14 elements of the periodic tableand wherein the inorganic fraction comprises particles with a size inthe range 10 nm to 100 nm. The said modified nano-particulate dispersionof the inorganic component may be selected from a plurality of availablecommercial products of various elemental nano-particulate dispersionsincluding but not limited to colloidal silica dispersion, fumed silicadispersion, Aerodisp W 7520 (aqueous dispersion of hydrophilic fumedsilica), Aerodisp WR 8520 (aqueous dispersion of hydrophobic fumedsilica) NanoBYK 3620 (surface treated silica Nanoparticle dispersion),or any combinations thereof.

Referring to FIG. 1, in one embodiment, the invention relates to anorganic-inorganic hybrid polymer latex to be used in traffic markingpaints wherein the process for preparation of said polymer latex mayinclude in a first step preparation of a pre-emulsion of monomer mixture(101) of unsaturated organic compounds that contains the COOH group,preferably of organic compounds with the general formula CH₂═CHCOOHincluding salts, esters, alkyl esters of the said compounds includingbut not limited to C1 to C24 alkyl esters of (meth)acrylic acid such asmethyl (meth)acrylate; ethyl acrylate; butyl (meth)acrylate, lauryl(meth)acrylate, and stearyl (meth)acrylate; hydroxyethyl (meth)acrylate;hydroxypropyl (meth)acrylate; alkenes such as ethylene; dienes such asbutadiene; styrene, alpha-methyl styrene; ring substituted styrenes; and(meth)acrylonitrile, allyl (meth)acrylate, diallyl phthalate,1,4-butylene glycol dimethacrylate, 1,6-hexanediol diacrylate, anddivinyl benzene, (meth)acrylamide; substituted (meth)acrylamides such as(meth)acrylamides with alpha-alkyl or aryl groups, or N-alkyl or arylgroups carboxylic acid monomers such as (meth)acrylic acid, itaconicacid, fumaric acid, crotonic acid, maleic acid, monomethyl itaconate,monomethyl fumarate, monobutyl fumarate, and maleic anhydride; sulfurcontaining acids such as 2-acrylamido-2-methyl-1-propanesulfonic acidand sodium vinyl sulfonate; and phosphorus containing acids such as2-phosphoethyl (meth)acrylate or any combinations thereof. To form themonomer mix pre-emulsion, the said monomers are prepared in a dispersionmedium which may preferably be demineralized water and with otheressential elements like surfactants and chain transfer agents. Chaintransfer reactions reduce the average molecular weight of the finalpolymer and the present invention discloses the use of mercaptans andmore particularly Tertiarydodecylmercaptan as a preferred chain transferagent. The primary role of surfactants in emulsion polymerization is tolower the interfacial tension, which allows the emulsification ofreactive monomers and the formation of stable colloidal dispersions ofnano-size polymer particles. Further, as a part of the first step, theprocess may include addition of a modified inorganic componentcomprising nano-particulate formulation (102) of the oxide of ametalloid with four valence electrons in its p orbital and belonging tothe group 14 elements of the periodic table with a size in the range 10nm to 100 nm. The said nano-particulate formulation may also be preparedusing demineralized water as dispersion medium and may also be mixedwith the monomer emulsion.

In another embodiment, the invention relates to an organic-inorganichybrid polymer latex to be used in traffic marking paints wherein theprocess of addition of modified nano-particulate formulation of theinorganic component (102) of hybrid polymer comprising of the oxide of ametalloid with four valence electrons in its p orbital and belonging tothe group 14 elements of the periodic table with a size in the range 10nm to 100 nm as a part of the first step of the process may include aseparate preparation of the nanoparticulate dispersion usingdemineralized water as a dispersion medium which is added to apre-formed monomer mix pre-emulsion of unsaturated organic compoundsthat contain the COOH group, preferably of organic compounds with thegeneral formula CH₂═CHCOOH including salts, esters, alkyl esters of thesaid compounds.

In an exemplary embodiment, the invention relates to anorganic-inorganic hybrid polymer latex to be used in traffic markingpaints wherein the process of addition of modified nano-particulateformulation of the inorganic component (102) of hybrid polymercomprising nanoparticulate dispersion of said component may be chargedalong with monomer mix pre-emulsion (101) as a separate feedsimultaneously using delayed addition technique (FIG. 1a ) at 82 degreeCelsius or the said nanoparticulate dispersion may be added through themonomer mix pre-emulsion (FIG. 1b ) or the said nanoparticulatedispersion may be pre-added in the initial reactor kettle charge (104)(FIG. 1c ). The modified nano-particulate dispersion may be prepared bychemical or thermal modification and may include a plurality of existingcommercial products including but not limited to colloidal silicadispersions, fumed silica dispersions, Aerodisp W 7520 (aqueousdispersion of hydrophilic fumed silica), Aerodisp WR 8520 (aqueousdispersion of hydrophobic fumed silica), NanoBYK 3620 (surface treatedsilica Nanoparticle dispersion) or any combinations thereof.

In one embodiment, the invention relates to an organic-inorganic hybridpolymer latex to be used in traffic marking paints wherein the initialstep of the process for preparation of said latex may includepreparation of initial pure monomer pre-emulsion (101) (MonophasicSystem A) in demineralized water of unsaturated organic compounds thatcontain the COOH group, preferably of organic compounds with the generalformula CH₂═CHCOOH including salts, esters, alkyl esters of the saidcompounds and with the use of conventional surface-tension reducingagents like detergents or emulsifiers or wetting agents.

In one embodiment, the invention relates to an organic-inorganic hybridpolymer latex to be used in traffic marking paints wherein the processfor preparation of said polymer latex may include in a subsequent secondstep preparing an initiator solution (103) comprising modifiednanoparticulate dispersion of inorganic component (102) obtained in thefirst step, organic monomer mix pre-emulsion (101) obtained in the firststep and a compound which may through thermal generation of freeradicals initiate the polymerization of the initial monomer mixpre-emulsion. Such a compound may be selected from a plurality ofradical generating compounds known in the present state of art and mayoptionally be ions or compounds containing the anions SO₄ ²⁻ or S₂O₈ ²⁻.The said process for polymerization through thermal activation of freeradical formation may be performed at a temperature of less than 100degree Celsius and more preferably at a temperature of 82 degreeCelsius. The said process in the said second step may include additionof a pre-existing polymer seed (external seed) in kettle charge (104)comprising pre-formed polymers of organic compounds that contain theCOOH group, preferably of organic compounds with the general formulaCH₂═CHCOOH including salts, esters, alkyl esters of the said compoundswherein said external seed may contain components with a particulatesize not more than 60 nm and preferably comprise at least 33% solids.

In one embodiment, the invention relates to an organic-inorganic hybridpolymer latex to be used in traffic marking paints whereinpolymerization of monomers can be carried out in presence of surfaceactive agents using Thermal or Redox initiation system. The reactiontemperature is maintained at a temperature lower than 100 DegreeCelsius. Preferred is a reaction temperature between 40-95 DegreeCelsius, more preferably between 76 and 88 Degree Celsius.

In an exemplary embodiment, the invention relates to anorganic-inorganic hybrid polymer latex to be used in traffic markingpaints wherein the process for preparation of said polymer latex mayinclude in a second step preparing an initiator solution (103) of acompound including but not limited to persulfate solution indemineralized water for thermal activation of polymerization processalong with said modified nanoparticulate dispersion of inorganiccompounds (102), said monomer mix pre-emulsion (101) obtained in thefirst step and a preformed acrylic polymer latex as external seed inkettle charge (104) comprising at least 33% solids and particle size notmore than 60 nm and wherein said additions are carried on at atemperature preferably of 82 degree Celsius and further holding the saidpolymer latex at 82 degree to 86 degree Celsius for a period of at least30 mins to form the Polymer latex.

In one embodiment, the invention relates to an organic-inorganic hybridpolymer latex to be used in traffic marking paints wherein the processfor preparation of said polymer latex may include in a subsequent thirdstep ensuring that trace monomers have also completely reacted andpolymerized. The said third step thus involves addition of a chasercompound and catalyst compound together (chaser-catalyst) system (105)after cooling the polymer latex of step two. The chaser catalyst systemused in the present invention may comprise of a solution of a salt of aninorganic compound of the chemical formula S₂O₅ including but notlimited to a sodium salt of said inorganic compound and a radicalpolymerization oxidation initiator which may comprise a branchedtertiary molecule of a peroxide at a suitable concentration.

In an exemplary embodiment, the invention relates to anorganic-inorganic hybrid polymer latex to be used in traffic markingpaints wherein the process for preparation of said polymer latex mayinclude in a third step cooling the Polymer latex of step two to 70degree Celsius followed by addition of a chaser-catalyst system (105)which may comprise sodium metabisulphite and tertiary butylhydroperoxide in a 70% aqueous solution to allow traces of monomer ifany to react and polymerize.

In one embodiment, the invention relates to an organic-inorganic hybridpolymer latex to be used in traffic marking paints wherein the processfor preparation of said polymer latex may include in a subsequent fourthstep cooling the completely polymerized polymer latex to 45 degreeCelsius followed by neutralization with ammonia to a pH in the range of9.5-10.5 and addition of at least 2 parts per 100 parts of polymer byweight of post-additives (106) which improve certain properties in thecoating composition like moisture proofing, water repellence and earlywater resistance of the resultant composition and the paint in which itis used. The post additives (106) may comprise typicalpolyethyleneimines like Lupasol G 20, Lupasol G 35, Montrek PEI 6,Montrek PEI 18, Epomin SP 003, Epomin SP 006, Epomin SP 012, Epomin SP018, Corcat P12, Corcat P18 or any combinations thereof. The said postadditive may further comprise polyfunctional amines comprisingpolymerization products prepared from dimethylaminoethyl acrylate ormethacrylate, beta-aminoethyl acrylate or methacrylate;N-beta-aminoethyl acrylamide or methacrylamide,N-(monomethylaminoethyl)-acrylamide or methacrylamide,N-(mono-n-butyl)-4-25 aminobutyl acrylate or methacrylate,methacryloxyethoxyethylamine, or acryloxypropoxypropoxypropylamine,2-[4-(2,6-dimethylheptylidene)-amino]-ethyl methacrylate,3-[2-(4-methylpentylidine)-amino]-propyl methacrylate,beta-(benzylideneamino)-ethyl methacrylate;2-[4-(2,6-dimethylheptylidene)-amino]-ethyl acrylate;12-(cyclopentylidene-amino)-dodecyl methacrylate,N-(1,3-dimethylbutylidene)-2-(2-methacryloxyethoxy)-ethylamine,N-(benzylidene)-methacryloxyethoxyethylamine,N-(1,3-dimethylbutylidene)-2-(2-acryloxyethoxy)-ethylamine, or anycombinations thereof.

In an exemplary embodiment, the invention relates to anorganic-inorganic hybrid polymer latex to be used in traffic markingpaints wherein the process for preparation of said polymer latex mayinclude in a fourth and final step addition of at least 2 part per 100parts by weight of the polymer of polyfunctional amines (106) likepolyethyleneamine or polymerization products of aziridine orpolyethyleneamine or a combination thereof as post-additives at pH of9.5 to 10.5 after ammonia neutralization to result in finalorganic-inorganic hybrid polymer coating composition.

In one embodiment, the invention relates to an organic-inorganic hybridpolymer latex to be used in traffic marking paints wherein the saidpolymer has properties which are suitable for application in highdurable paint or conventional paint. The application of the paint alsois related to another parameter called wet film thickness. Wet filmthickness is the thickness of wet paint or any coating film that isliquid based. Measuring wet film thickness is necessary to identify theamount of material that needs to be applied to achieve a particular dryfilm thickness that will give the best protection against damage, wearand corrosion. Wet thickness is at its peak right after the applicationof coating. It decreases once volatiles and solvents from the coatingfilm undergo evaporation. The present invention discloses anorganic-inorganic hybrid polymer latex to be used in traffic markingpaints wherein said polymer may be incorporated in a traffic markingpaint and may be used for high durable paints with a wet film thicknessof 750 micron or may be used for conventional traffic paints with a wetfilm thickness of up to 500 micron.

In one embodiment, the invention relates to an organic-inorganic hybridpolymer latex to be used in traffic marking paints wherein the saidpolymer may possess superior durability, longevity, scrub resistance,rain and moisture proof properties, higher tolerance for humidity andother such characteristics as gauged by various standard evaluationsystems. American Society for Testing and Materials (ASTM), is aninternational standards organization that develops and publishesvoluntary consensus technical standards for a wide range of materials,products, systems, and services. One of such characteristics is the WetScrub Resistance Test and the ASTM has developed a standard method forits evaluation in ASTM D2486. These test methods cover a procedure fordetermining the resistance of wall paints to erosion caused byscrubbing, referred to herein after as “scrub resistance”. Anotherstandard test for evaluating the durability and stability of the paintis the ASTM D711 for No Pick-Up Time Test. The method uses a wheelconsisting of a metal cylinder with rubber O-rings. The wheel is rolleddown a ramp over a freshly applied traffic paint film repeatedly untilthere is no transfer of paint to the rubber rings. The elapsed time frompaint film application to point of no paint transfer is the no-pick-uptime. A further standard for evaluating the resistance of the trafficpaint to humidity, rain, water corrosion etc. can be in the form of theWet Cohesion Test. Time taken for paint film to dry sufficient enough towithstand pressure is recorded. The lesser the time required to dry thefilm, the better is cohesion. A paint film is cast with wet filmthickness of 500 microns on a glass plate and allowed to dry at 24±1Degree C., 65±5% relative humidity using a humidity chamber.Subsequently, a drop of distilled water is put on the paint film, andafter waiting for 60 seconds, the paint film is twisted at the placewhere water drop was positioned, with thumb using approximate pressureof 4 kg. Paint should not show cracks/deformation. The time required fordrying of the film is recorded as the Wet Cohesion Time.

In another embodiment, the invention relates to an organic-inorganichybrid polymer latex to be used in traffic marking paints wherein thesaid polymer may contain a particle size ranging from 50 nm to 500 nmand more specifically may contain a particulate size ranging from 150 nmto 250 nm. The polymer particle size may be evaluated by the BrookhavenParticle Size Analyser using the principle of Dynamic Light Scattering.

In one embodiment, the invention relates to the process of obtaining thehybrid polymer latex to be used in traffic marking paints wherein thesaid polymer may provide in enhanced wet scrub resistance (ASTM D2486)in the range of a factor of 1.5 to 2.4 i.e. in the range of 3000 scrubsto more than 4800 scrubs due homogenous integration and association ofthe inorganic moiety in the polymer structure characterizing in that thetest is conducted with 175 Micron applicator having 4 strips/abrasionmedia followed by 7 days curing at Room Temperature.

In one embodiment, the invention relates to the process of obtaining thehybrid polymer latex to be used in traffic marking paints wherein thesaid polymer may provide reduced no-pick up time (ASTM D711) in therange of 13 min to 20 min, characterizing in that the test is carried on750 micron applicator with drying at 24±2° C. & 60±5% humidity, furtherrolled by 5 Kg roller with band of rubber and lastly checked for thetime at which no paint adheres to the rubber band.

In one embodiment, the invention relates to an organic-inorganic hybridpolymer latex to be used in traffic marking paints wherein the saidpolymer may possess a Glass Transition Temperature (Tg) broadly in therange of 0 degree Celsius to 50 degree Celsius and more specifically inthe range of 15 degree Celsius to 35 degree Celsius. The Tg is one ofthe most important properties of any latex and is the temperature regionwhere the polymer transitions from a hard, glassy material to a soft,rubbery material and is of immense significance particularly forstability, durability and easy of application of hybrid polymers to beused in traffic markings.

The following examples of the various embodiments may reveal a deeperunderstanding of the various properties of the organic-inorganic hybridpolymer latex to be used in traffic marking paints:

Example 1: Double Negative Control—[Ref No. HDRMP-073A (FIG. 2)]—NoInorganic Component, No Polyfunctional Amine Additives

Procedure:

To 200 g of demineralized water, 24 g of external acrylic polymer seedlatex (solid content at least 33%, average particle diameter 50 nm) wasadded in a Glass reactor. 2.5 g of Sodium Bicarbonate was dissolved in50 g of Demineralized water and added to the reactor. The contents wereheated to 82 degree Celsius followed by addition of 20 g of 2% solutionof potassium persulphate in demineralized water to reactor. Thefollowing two feeds were added over a period of 3 hours: 1) Monomer mixpre-emulsion as mentioned in Table 1A and 2) 100 g of 2% solution ofPotassium Persulphate in demineralized water.

TABLE 1A Ingredient Weight in grams Demineralized water 300 SodiumLauryl Sulphate 5 Methyl Methacrylate 380 Butyl Acrylate 345 MethacrylicAcid 8

At the end of feed of monomer mix pre-emulsion and initiator solution,the contents of the reactor were held at 82 degree Celsius for 1 hour,then partially cooled to 70 degree Celsius and 0.6 g of Tertiary ButylHydroperoxide with 3 g of demineralized water was added separately &simultaneously with a solution of 0.4 g of sodium metabisulphite in 10 gof Demineralized water. The polymer latex formed was held for 1 hour at68-70 degree Celsius to allow reaction of traces of monomer. Further,the polymer latex was cooled below 40 Degree Celsius and 15 g of 25%Ammonium Hydroxide solution was added to provide final pH of 9.8-10.2. Asolution of 1.5 g of Acticide SPX preservative in 5 g of water was addedto the polymer latex for in-can preservation. The resulting polymerlatex has the following properties contained in Table 1B:

TABLE 1B Parameters Value Total Solid Content 50.5% w/w Particle Size(diameter) 161 nm Molecular Weight of the Polymer (Mw) 245,000 GlassTransition Temperature Tg 26 degree C. Viscosity Rise in paint after 3days at 55 Deg C. 10% No Pick Up Time - On glass plate, 750 micron,drying 38 min @25° C./60% humidity, roll 5 Kg roller with rubber band,check for the time at which no paint adheres to the rubber band WetScrub Resistance - 175 Micron applicator 2050 scrubs (4 strips/AbrasionMedia), 7 days curing at RT Wet Cohesion Test 154 minutes

Example 2: No Inorganic Component, Polyfunctional Amines Present [RefNo. HDRMP-062A (FIG. 3)]

Procedure:

To 200 g of demineralized water, 24 g of external Acrylic polymer seedlatex (solid content at least 33%, average particle diameter 50 nm) wasadded in a glass reactor. 2.5 g of sodium bicarbonate was dissolved in50 g of demineralized water and added to the reactor. The contents wereheated to 82 degree Celsius. Then 20 g of 2% solution of potassiumpersulphate in demineralized water was added to reactor. The followingtwo feeds were added over a period of 3 hours: 1) Monomer mixpre-emulsion as mentioned in Table 2A, 2) 100 g of 2% solution ofpotassium persulphate in demineralized water

TABLE 2A Ingredient Weight in grams Demineralized water 250 SodiumLauryl Sulphate 5 Methyl Methacrylate 380 Butyl Acrylate 345 MethacrylicAcid 8

At the end of feed of monomer mix pre-emulsion and initiator solution,the contents of the reactor were held at 82 degree Celsius for 1 hour,then partially cooled to 70 degree Celsius and 0.6 g of tertiary butylhydroperoxide with 3 g of demineralized water was added separately &simultaneously with a solution of 0.4 g of sodium metabisulphite in 10 gof demineralized water. The polymer latex formed was held for 1 hour at68-70 degree Celsius to allow reaction of traces of monomer. Then thepolymer latex was cooled below 40 degree Celsius and 15 g of 25%Ammonium Hydroxide solution was added to provide final pH of 9.8-10.5. Asolution of polyethyleneamine—2 parts per 100 parts by weight of polymeris added to above polymer latex under stirring. To the polymer latex,Polyethyleneimine—1 part per 100 parts by weight of polymer is addedunder stirring. A solution of 1.5 g of Acticide SPX preservative in 5 gof water was added to the polymer latex for in-can preservation. Theresulting polymer latex has the following properties contained in Table2B:

TABLE 2B Parameters Value Total Solid Content 50.8% w/w Particle Size(diameter) 202 nm Molecular Weight of the Polymer (Mw) 250,000 GlassTransition Temperature (Tg) 27 degree C. Viscosity Rise in paint after 3days at 55 Deg C. 13% No Pick Up Time - On glass plate, 750 micron,drying 18 min @25° C./60% humidity, roll 5 Kg roller with rubber band,check for the time at which no paint adheres to the rubber band WetScrub Resistance - 175 Micron applicator 2250 scrubs (4 strips/AbrasionMedia), 7 days curing at RT Wet Cohesion Test 113 minutes

Example 3: External Addition of Inorganic Component, PolyfunctionalAmines Present [Ref No. HDRMP-076A (FIG. 4)]

Procedure:

To 200 g of demineralized water, 24 g of external acrylic polymer seedlatex (solid content at least 33%, average particle diameter 50 nm) wasadded in a glass reactor. 2.5 g of sodium bicarbonate was dissolved in50 g of demineralized water and added to the reactor. The contents wereheated to 82 degree Celsius. Then 20 g of 2% solution of potassiumpersulphate in demineralized water was added to reactor. Following twofeeds were added over a period of 3 hours: 1) monomer mix pre-emulsionas mentioned in Table 3A, and 2) 100 g of 2% solution of Potassiumpersulphate in demineralized water

TABLE 3A Ingredient Weight in grams Demineralized water 250 SodiumLauryl Sulphate 5 Methyl Methacrylate 380 Butyl Acrylate 345 MethacrylicAcid 8 Modified nanoparticle dispersion of 1.5 parts by weight ofpolymer inorganic component added externally

At the end of feed of monomer mix pre-emulsion and initiator solution,the contents of the reactor were held at 82 degree Celsius for 1 hour,then partially cooled to 70 degree Celsius and 0.6 g of tertiary butylhydroperoxide with 3 g of demineralized water was added separately &simultaneously with a solution of 0.4 g of sodium metabisulphite in 10 gof demineralized water. The polymer latex formed was held for 1 hour at68-70 degree Celsius to allow reaction of traces of monomer Then thepolymer latex was cooled below 40 degree Celsius and 15 g of 25%ammonium hydroxide solution was added to provide final pH of 9.8-10.5. Asurface treated silica nanoparticle dispersion is added externally (1.5parts by weight of polymer) to above polymer latex under stirring. Asolution of polyethyleneamine—2 parts per 100 parts by weight of polymeris added to above polymer latex under stirring. To the polymer latex,Polyethyleneimine—1 part per 100 parts by weight of polymer is addedunder stirring. A solution of 1.5 g of Acticide SPX preservative in 5 gof water was added to the polymer latex for in-can preservation. Theresulting polymer latex has the following properties contained in Table3B:

TABLE 3B Parameters Value Total Solid Content 51% w/w Particle Size(diameter) 175 nm Molecular Weight of the Polymer (Mw) 245,500 GlassTransition Temperature (Tg) 28 degree C. Viscosity Rise in paint after 3days at 55 Deg C. 12% No Pick Up Time - On glass plate, 750 micron,drying 18 min @25° C./60% humidity, roll 5 Kg roller with rubber band,check for the time at which no paint adheres to the rubber band WetScrub Resistance - 175 Micron applicator 2850 scrubs (4 strips/AbrasionMedia), 7 days curing at RT Wet Cohesion Test 100 minutes

Example 4: 1.5 Parts Modified Inorganic Component Per 100 Parts byWeight of Polymer Added During Reaction, Polyfunctional Amines Present[Ref No. HDRMP-039A (FIG. 5)]

Procedure:

To 200 g of demineralized water, 24 g of external acrylic polymer seedlatex (solid content at least 33%, average particle diameter 50 nm) wasadded in a glass reactor. 2.5 g of sodium bicarbonate was dissolved in50 g of demineralized water and added to the reactor. The contents wereheated to 82 degree Celsius. Then 20 g of 2% solution of PotassiumPersulphate in Demineralized water was added to reactor. Following threefeeds were added over a period of 3 hours: 1) Monomer mix pre-emulsionas mentioned in Table 4A, 2) 100 g of 2% solution of potassiumpersulphate in demineralized water, 3) 1.5 part on hundred parts ofpolymer of surface treated silica nanoparticle dispersion diluted in 1:2proportion with water

TABLE 4A Ingredient Weight in grams Demineralized water 250 SodiumLauryl Sulphate 5 Methyl Methacrylate 380 Butyl Acrylate 345 MethacrylicAcid 8 Modified nanoparticle dispersion of 1.5 parts by weight ofpolymer inorganic component added during reaction

The pH during reaction and after completion of monomer mix pre-emulsionaddition was in the range of 5-7. At the end of feed of monomer mixpre-emulsion and initiator solution, the contents of the reactor wereheld at 82 degree Celsius for 1 hour, then partially cooled to 70 degreeCelsius and 0.6 g of tertiary butyl hydroperoxide with 3 g ofdemineralized water was added separately & simultaneously with asolution of 0.4 g of sodium metabisulphite in 10 g of demineralizedwater. The polymer latex formed was held for 1 hour at 68-70 degreeCelsius to allow reaction of traces of monomer. Then the polymer latexwas cooled below 40 degree Celsius and 15 g of 25% Ammonium Hydroxidesolution was added to provide final pH of 9.8-10.5. A solution ofPolyethyleneAmine—2 parts per hundred parts by weight of polymer isadded to above polymer latex under stirring. To the polymer latex,Polyethyleneimine—1 part per 100 parts by weight of polymer is addedunder stirring. A solution of 1.5 g of Acticide SPX preservative in 5 gof water was added to the polymer latex for in-can preservation. Theresulting polymer latex has the following properties contained in Table4B:

TABLE 4B Parameters Value Total Solid Content 50.45% w/w Particle Size(diameter) 160 nm Molecular Weight of the Polymer (Mw) 236,000 GlassTransition Temperature (Tg) 29 degree C. Viscosity Rise in paint after 3days at 55 Deg C. 20% No Pick Up Time - On glass plate, 750 micron,drying 15 min @25° C./60% humidity, roll 5 Kg roller with rubber band,check for the time at which no paint adheres to the rubber band WetScrub Resistance - 175 Micron applicator 4800 scrubs (4 strips/AbrasionMedia), 7 days curing at RT Wet Cohesion Test 76 minutes

Example 5: 0.75 Parts Modified Inorganic Component Per 100 Parts byWeight of Polymer Added During Reaction Added During Reaction,Polyfunctional Amines Present [Ref No. HDRMP-043A (FIG. 6)]

Procedure:

To 200 g of demineralized water, 24 g of external acrylic polymer seedlatex (solid content at least 33%, average particle diameter 50 nm) wasadded in a glass reactor. 2.5 g of sodium bicarbonate was dissolved in50 g of demineralized water and added to the reactor. The contents wereheated to 82 degree Celsius.

Then 20 g of 2% solution of potassium persulphate in demineralized waterwas added to reactor.

Following three feeds were added over a period of 3 hours: 1) monomermix Pre-emulsion as mentioned in Table 5A, 2) 100 g of 2% solution ofpotassium persulphate in Demineralized water and 3) 0.75 part on hundredparts of polymer of surface treated silica nanoparticle dispersiondiluted in 1:2 proportion with water

TABLE 5A Ingredient Weight in grams Demineralized water 250 SodiumLauryl Sulphate 5 Methyl Methacrylate 380 Butyl Acrylate 345 MethacrylicAcid 8 Modified nanoparticle dispersion of 0.75 parts by weight ofpolymer inorganic component added during reaction

The pH during reaction and after completion of monomer mix pre-emulsionaddition was in the range of 5-7. At the end of feed of monomer mixpre-emulsion and initiator solution, the contents of the reactor wereheld at 82 degree Celsius for 1 hour, then partially cooled to 70 degreeCelsius and 0.6 g of tertiary butyl hydroperoxide with 3 g ofdemineralized water was added separately & simultaneously with asolution of 0.4 g of sodium metabisulphite in 10 g of demineralizedwater. The polymer latex formed was held for 1 hour at 68-70 degreeCelsius to allow reaction of traces of monomer. Then the polymer latexwas cooled below 40 degree Celsius and 15 g of 25% ammonium hydroxidesolution was added to provide final pH of 9.8-10.5. A solution ofPolyethylene Amine—2 parts per hundred parts by weight of polymer isadded to above polymer latex under stirring. To the polymer latex,polyethyleneimine—1 part per 100 parts by weight of polymer is addedunder stirring. A solution of 1.5 g of Acticide SPX preservative in 5 gof water was added to the polymer latex for in-can preservation. Theresulting polymer latex has the following properties contained in Table5B:

TABLE 5B Parameters Value Total Solid Content 50.2% w/w Particle Size(diameter) 205 nm Molecular Weight of the Polymer (Mw) 268,325 GlassTransition Temperature (Tg) 27 degree C. Viscosity Rise in paint after 3days at 55 Deg C. 27% No Pick Up Time - On glass plate, 750 micron,drying 15 min @25° C./60% humidity, roll 5 Kg roller with rubber band,check for the time at which no paint adheres to the rubber band WetScrub Resistance - 175 Micron applicator 3160 scrubs (4 strips/AbrasionMedia), 7 days curing at RT Wet Cohesion Test 85 minutes

Example 6: 1 Parts Modified Inorganic Component Per 100 Parts by Weightof Polymer Added During Reaction Added During Reaction, PolyfunctionalAmines Present [Ref No. HDRMP-075A (FIG. 7)]

Procedure:

To 200 g of demineralized water, 24 g of external acrylic polymer seedlatex (solid content at least 33%, average particle diameter 50 nm) wasadded in a Glass reactor. 2.5 g of Sodium Bicarbonate was dissolved in50 g of demineralized water and added to the reactor. The contents wereheated to 82 degree Celsius. Then 20 g of 2% solution of potassiumpersulphate in demineralized water was added to reactor. Following threefeeds were added over a period of 3 hours: 1) monomer mix pre-emulsionas mentioned in Table 6A, 2) 100 g of 2% solution of potassiumpersulphate in demineralized water, 3) 1 part on hundred parts ofpolymer of Surface Treated silica Nanoparticle Dispersion diluted in 1:2proportion with water

TABLE 6A Ingredient Weight in grams Demineralized water 250 SodiumLauryl Sulphate 5 Methyl Methacrylate 380 Butyl Acrylate 345 MethacrylicAcid 8 Modified nanoparticle dispersion of 1 parts by weight of polymerinorganic component added during reaction

The pH during reaction and after completion of monomer mix pre-emulsionaddition was in the range of 5-7. At the end of feed of monomer mixpre-emulsion and initiator solution, the contents of the reactor wereheld at 82 degree Celsius for 1 hour, then partially cooled to 70 degreeCelsius and 0.6 g of Tertiary Butyl Hydroperoxide with 3 g ofdemineralized water was added separately & simultaneously with asolution of 0.4 g of sodium metabisulphite in 10 g of demineralizedwater. The polymer latex formed was held for 1 hour at 68-70 degreeCelsius to allow reaction of traces of monomer. Then the polymer latexwas cooled below 40 degree Celsius and 15 g of 25% Ammonium Hydroxidesolution was added to provide final pH of 9.8-10.5. A solution ofpolyethyleneAmine—2 parts per hundred parts by weight of polymer isadded to above polymer latex under stirring. To the polymer latex,polyethyleneimine—1 part per 100 parts by weight of polymer is addedunder stirring. A solution of 1.5 g of Acticide SPX preservative in 5 gof water was added to the polymer latex for in-can preservation. Theresulting polymer latex has the following properties contained in Table6B:

TABLE 6B Parameters Value Total Solid Content 50.75% w/w Particle Size(diameter) 174 nm Molecular Weight of the Polymer (Mw) 239,300 GlassTransition Temperature (Tg) 27 degree C. Viscosity Rise in paint after 3days at 55 Deg C. 17% No Pick Up Time - On glass plate, 750 micron,drying 17 min @25° C./60% humidity, roll 5 Kg roller with rubber band,check for the time at which no paint adheres to the rubber band WetScrub Resistance - 175 Micron applicator 3375 scrubs (4 strips/AbrasionMedia), 7 days curing at RT Wet Cohesion Test 80 minutes

Example 7: 1.25 Parts Modified Inorganic Component Per 100 Parts byWeight of Polymer Added During Reaction Added, Polyfunctional AminesPresent [Ref No. HDRMP-071A (FIG. 8)]

Procedure:

To 200 g of demineralized water, 24 g of external acrylic polymer seedlatex (solid content at least 33%, average particle diameter 50 nm) wasadded in a glass reactor. 2.5 g of sodium bicarbonate was dissolved in50 g of demineralized water and added to the reactor. The contents wereheated to 82 degree Celsius.

Then 20 g of 2% solution of potassium persulphate in demineralized waterwas added to reactor.

Following three feeds were added over a period of 3 hours: 1) monomermix pre-emulsion as mentioned in Table 7A, 2) 100 g of 2% solution ofpotassium persulphate in demineralized water, 3) 1.25 part on hundredparts of polymer of surface treated silica nanoparticle dispersiondiluted in 1:2 proportion with water.

TABLE 7A Ingredient Weight in grams Demineralized water 250 SodiumLauryl Sulphate 5 Methyl Methacrylate 380 Butyl Acrylate 345 MethacrylicAcid 8 Modified nanoparticle dispersion of 1.25 parts by weight ofpolymer inorganic component added during reaction

The pH during reaction and after completion of monomer mix pre-emulsionaddition was in the range of 5-7. At the end of feed of monomer mixpre-emulsion and initiator solution, the contents of the reactor wereheld at 82 degree Celsius for 1 hour, then partially cooled to 70 degreeCelsius and 0.6 g of Tertiary Butyl Hydroperoxide with 3 g ofdemineralized water was added separately & simultaneously with asolution of 0.4 g of Sodium metabisulphite in 10 g of demineralizedwater. The polymer latex formed was held for 1 hour at 68-70 degreeCelsius to allow reaction of traces of monomer. Then the polymer latexwas cooled below 40 degree Celsius and 15 g of 25% Ammonium Hydroxidesolution was added to provide final pH of 9.8-10.5. A solution ofPolyethyleneAmine—2 parts per hundred parts by weight of polymer isadded to above polymer latex under stirring. To the polymer latex,Polyethyleneimine—1 part per 100 parts by weight of polymer is addedunder stirring. A solution of 1.5 g of Acticide SPX preservative in 5 gof water was added to the polymer latex for in-can preservation. Theresulting polymer latex has the following properties contained in Table7B

TABLE 7B Parameters Value Total Solid Content 50.52% w/w Particle Size(diameter) 186 nm Molecular Weight of the Polymer (Mw) 231,400 GlassTransition Temperature (Tg) 28 degree C. Viscosity Rise in paint after 3days at 55 Deg C. 17% No Pick Up Time - On glass plate, 750 micron,drying 15 min @25° C./60% humidity, roll 5 Kg roller with rubber band,check for the time at which no paint adheres to the rubber band WetScrub Resistance - 175 Micron applicator 3950 scrubs (4 strips/AbrasionMedia), 7 days curing at RT Wet Cohesion Test 83 minutes

Example 8: 0.75 Parts Modified Inorganic Component Per 100 Parts byWeight of Polymer Added During Reaction, Only Polyethyleneamine Added.[Ref No. HDRMP-074A (FIG. 9)]

Procedure:

To 200 g of demineralized water, 24 g of external acrylic polymer seedlatex (solid content at least 33%, average particle diameter 50 nm) wasadded in a glass reactor. 2.5 g of sodium bicarbonate was dissolved in50 g of demineralized water and added to the reactor. the contents wereheated to 82 degree Celsius. Then 20 g of 2% solution of potassiumpersulphate in demineralized water was added to reactor. Following threefeeds were added over a period of 3 hours: 1) monomer mix pre-emulsionas mentioned in Table 8A, 2) 100 g of 2% solution of Potassiumpersulphate in Demineralized water, 3) 0.75 part on hundred parts ofpolymer of surface treated silica nanoparticle dispersion diluted in 1:2proportion with water

TABLE 8A Ingredient Weight in grams Demineralized water 250 SodiumLauryl Sulphate 5 Methyl Methacrylate 380 Butyl Acrylate 345 MethacrylicAcid 8 Modified nanoparticle dispersion of 0.75 parts by weight ofpolymer inorganic component added during reaction

The pH during reaction and after completion of monomer mix pre-emulsionaddition was in the range of 5-7. At the end of feed of monomer mixpre-emulsion and initiator solution, the contents of the reactor wereheld at 82 degree Celsius for 1 hour, then partially cooled to 70 degreeCelsius and 0.6 g of Tertiary Butyl Hydroperoxide with 3 g ofdemineralized water was added separately & simultaneously with asolution of 0.4 g of Sodium metabisulphite in 10 g of demineralizedwater. The polymer latex formed was held for 1 hour at 68-70 degreeCelsius to allow reaction of traces of monomer. Then the polymer latexwas cooled below 40 degree Celsius and 15 g of 25% Ammonium Hydroxidesolution was added to provide final pH of 9.8-10.5. A solution ofPolyethyleneAmine—2 parts per hundred parts by weight of polymer isadded to above polymer latex under stirring. A solution of 1.5 g ofActicide SPX preservative in 5 g of water was added to the polymer latexfor in-can preservation. The resulting polymer latex has the followingproperties contained in Table 8B

TABLE 8B Parameters Value Total Solid Content 50.7% w/w Particle Size(diameter) 197 nm Molecular Weight of the Polymer (Mw) 231,352 GlassTransition Temperature (Tg) 28 degree C. Viscosity Rise in paint after 3days at 55 Deg C. 17% No Pick Up Time - On glass plate, 750 micron,drying 15 min @25° C./60% humidity, roll 5 Kg roller with rubber band,check for the time at which no paint adheres to the rubber band WetScrub Resistance - 175 Micron applicator 3562 scrubs (4 strips/AbrasionMedia), 7 days curing at RT Wet Cohesion Test 110 minutes

Example 9: 0.75 Parts Modified Inorganic Component Per 100 Parts byWeight of Polymer Present, No Addition of Polyfunctional Amines [Ref No.HDRMP-072A (FIG. 10)]

Procedure:

To 200 g of demineralized water, 24 g of external acrylic polymer seedlatex (solid content at least 33%, average particle diameter 50 nm) wasadded in a glass reactor. 2.5 g of sodium bicarbonate was dissolved in50 g of demineralized water and added to the reactor. the contents wereheated to 82 degree Celsius. Then 20 g of 2% solution of potassiumpersulphate in demineralized water was added to reactor. following threefeeds were added over a period of 3 hours: 1) monomer mix pre-emulsionas mentioned in table 9A, 2) 100 g of 2% solution of potassiumpersulphate in demineralized water and 3) 0.75 part on hundred parts ofpolymer of surface treated silica nanoparticle dispersion diluted in 1:2proportion with water

TABLE 9A Ingredient Weight in grams Demineralized water 300 SodiumLauryl Sulphate 5 Methyl Methacrylate 380 Butyl Acrylate 345 MethacrylicAcid 8 Modified nanoparticle dispersion of 0.75 parts by weight ofpolymer inorganic component added during reaction

The pH during reaction and after completion of monomer mix pre-emulsionaddition was in the range of 5-7. At the end of feed of monomer mixpre-emulsion and initiator solution, the contents of the reactor wereheld at 82 degree Celsius for 1 hour, then partially cooled to 70 degreeCelsius and 0.6 g of Tertiary Butyl Hydroperoxide with 3 g ofdemineralized water was added separately & simultaneously with asolution of 0.4 g of sodium metabisulphite in 10 g of demineralizedwater. The polymer latex formed was held for 1 hour at 68-70 degreeCelsius to allow reaction of traces of monomer. Then the polymer latexwas cooled below 40 degree Celsius and 15 g of 25% Ammonium Hydroxidesolution was added to provide final pH of 9.8-10.5. A solution of 1.5 gof Acticide SPX preservative in 5 g of water was added to the polymerlatex for in-can preservation. The resulting polymer latex has thefollowing properties contained in Table 9B

TABLE 9B Parameters Value Total Solid Content 50.25% w/w Particle Size(diameter) 170 nm Molecular Weight of the Polymer (Mw) 373,662 GlassTransition Temperature (Tg) 28 degree C. Viscosity Rise in paint after 3days at 55 Deg C. 20% No Pick Up Time - On glass plate, 750 micron,drying 40 min @25° C./60% humidity, roll 5 Kg roller with rubber band,check for the time at which no paint adheres to the rubber band WetScrub Resistance - 175 Micron applicator 3100 scrubs (4 strips/AbrasionMedia), 7 days curing at RT Wet Cohesion Test 132 minutes

In one embodiment, the invention relates to method of application of ahigh-durable traffic marking paint comprising at least anorganic-inorganic hybrid polymer latex. The method of application maycomprise applying on said road surface a traffic paint compositioncomprising at least a hybrid polymer latex in an aqueous evaporablecarrier, wherein said hybrid polymer latex comprises: a) an organicfraction composed of a polymer wherein the total solid content ofconstituent ingredients is at least 45% w/w, b) a modified inorganiccomponent comprising an inorganic fraction composed of nanoparticulatedispersion of an oxide of a metalloid from Group 14 of the periodictable having 4 valence electrons in its p-orbital, wherein the inorganicfraction in said latex is at least 0.4 parts per 100 parts by weight ofpolymer or more, and characterizing in that the hybrid polymer latexcomprises homogenous integration and association of the inorganic moietywith the polymer, and c) polyfunctional amines like polyethyleneamine orpolymerization products of aziridine or a combination thereof which isat least 2 parts per 100 parts by weight of the polymer, andcharacterizing in that said hybrid polymer latex a glass transitiontemperature between the range 0 degree Celsius to 60 degree Celsius andmore preferably in the range of 15 degree Celsius and 35 degree Celsius.The method of application may further comprise evaporating said aqueousevaporable carrier to form said high-durable traffic marking on saidroad surface, characterizing in that, said high-durable traffic markingpaint has no-pick up time estimated using ASTM D711 with 750 micronapplicator in the range of 13 min to 20 min at 60±5% humidity, a no-pickup time estimated using ASTM D711 with 500 micron applicator in therange of 07 min to 11 min at 60±5% humidity, and a wet scrub resistanceestimated using ASTM D2486 of up to 4800 scrubs.

In another embodiment, the invention relates to method of application ofa high-durable traffic marking paint comprising at least anorganic-inorganic hybrid polymer latex, wherein the method ofapplication may comprise all equipment used for application of paints tobe applied over concrete or masonry substrate, including but not limitedto conventional spray equipment or equipment made of stainless steel, orairless spray gun or any combination thereof.

In another embodiment, the invention relates to method of application ofa high-durable traffic marking paint comprising at least anorganic-inorganic hybrid polymer latex, wherein the method ofapplication may comprise paint ingredients including but are not limitedto rheology modifiers, pigments, extenders, dispersing agents, wettingagents, freeze thaw stabilizers, coalescing agents, preservatives,defoaming agents, anti-foaming agents, drying agents, fast evaporatingsolvents, glass beads (reflectors) or any combination thereof.

In another embodiment, the invention relates to method of application ofa high-durable traffic marking paint comprising at least anorganic-inorganic hybrid polymer latex, wherein the method ofapplication may comprise a step of evaporation of the volatile substanceafter application on road surface wherein, the pH of the composition maybe lowered upon evaporation of the volatile base and further may belowered to a point where the protonation of the polyamine and polyiminemay commence and may render the polyamine or polyimine or a mixturethereof, cationic.

In another embodiment, the invention relates to method of application ofa high-durable traffic marking paint comprising at least anorganic-inorganic hybrid polymer latex, wherein the method ofapplication may accelerate the paint-drying process by combiningcationic polymer with anionically stabilized polymer emulsion.

Referring to FIG. 11, in one embodiment, the invention relates to anorganic-inorganic hybrid polymer latex to be used in traffic markingpaints wherein the latex comprises homogenous integration andassociation of the inorganic moiety in the polymer structure. The figurerepresents transmission electron microscopy results of the said polymerwherein polymer latex at a scale of 1000 nm is not agglomerated andhomogenously distributed despite presence of at least 0.4 parts modifiednano-particles of the inorganic fraction comprising an oxide of ametalloid from Group 14 of the periodic table having four valenceelectrons in its p-orbital per 100 parts of the polymer by weight.

The foregoing description shall be interpreted as illustrative and notin any limiting sense. A person of ordinary skill in the art wouldunderstand that certain modifications could come within the scope ofthis disclosure.

What is claimed is:
 1. A process for obtaining the hybrid polymer latexcomprising steps of: preparing an initial monomer mix pre-emulsion(Biphasic System A) in demineralized water of unsaturated organiccompounds that contain the COOH group, and with surface-tension reducingagents comprising detergents, emulsifiers, and/or wetting agents,preparing an initial inorganic dispersion feed (Biphasic System B) bymixing a chemically or thermally modified inorganic component comprisingat least 50% of an inorganic fraction, the inorganic fraction comprisinga nanoparticulate dispersion of an oxide of an element having 4electrons in its outer orbital in demineralized water, preparing aninitiator solution (Solution C) for polymerization by mixing a compoundin demineralized water wherein said compound through thermal generationof free radicals initiates the polymerization of the initialpre-emulsion, adding Solution C simultaneously with Biphasic System Aand Biphasic System B at 82 degrees Celsius to a pre-formed acrylicpolymer latex used as external seed comprising at least 33% solids ofparticle size maximum 60 nm (Seed Latex D) to form Polymer latex E,holding temperature at 82-86 degrees Celsius for at least 30 minutes,cooling the Polymer latex E to 70 degrees Celsius followed by additionof a chaser catalyst system comprising a solution of Tertiary butylhydroperoxide simultaneously with a Sodium metabisulphite solutionthereby reacting traces of monomer, and cooling the Polymer latex E to45 degrees Celsius followed by neutralization with ammonia to a pHranging from 9.5 to 10.5 and adding at least 2 parts per 100 partspolymer by weight of polyfunctional amines comprising polyethyleneamine,polymerization products of aziridine or polyethyleneamine, or acombination thereof as post-additives to result in final hybrid polymerlatex (Polymer latex F).
 2. The process for obtaining the hybrid polymerlatex in claim 1, wherein the monomers of the pre-emulsion comprise atleast one of Methyl-Methacrylate, Butyl Acrylate, and (Meth)acrylicacid.
 3. The process for obtaining the hybrid polymer latex in claim 1,wherein the modified inorganic component comprise an inorganic fractionhaving a fumed or colloidal form of a nanoparticulate dispersion of theoxide of an element from the group of metalloids occurring in Group 14of the periodic table having four valence electrons in its p-orbital. 4.The process for obtaining the hybrid polymer latex in claim 1, whereinthe compounds used for preparing initiator solution (Solution C)comprise ions or compounds containing SO₄ ²⁻ or S₂O₈ ²⁻ anions.
 5. Theprocess for obtaining the hybrid polymer latex in claim 1, wherein thepolymerization products of aziridine as post-additives comprise ofpolyalkyleneimines.
 6. The process for obtaining the hybrid polymerlatex in claim 1, wherein the modified inorganic component comprises atleast 50% of an inorganic fraction, the inorganic fraction comprisingnanoparticulate inorganic fraction (Biphasic System B) is added eitherthrough delayed addition technique or is pre-mixed with the initialmonomer mix pre-emulsion (Biphasic System A) or is pre-added to a kettlecharge before addition of the monomer mix pre-emulsion (Biphasic SystemA).
 7. The process for obtaining the hybrid polymer latex in claim 1,wherein the final hybrid polymer latex is a durable paint with a wetfilm thickness of 750 microns or is a traffic paint with a wet filmthickness of up to 500 microns.
 8. The process for obtaining the hybridpolymer latex in claim 1, wherein the hybrid polymer latex provides wetscrub resistance (ASTM D2486) of up to 4800 scrubs with 175 micronapplicator, and said hybrid polymer latex provides a no-pick up time(ASTM D711) in the range of 13 minutes to 20 minutes with 750 micronapplicator, and said hybrid polymer latex provides wet cohesion between76 minutes to 132 minutes at temperature of 24±2° C. and humidity of65±5%.